Lighting-fixture



F. YOKEL.

uemrme FIXTURE. APPLICATION FILED NOV. 26-, 1917.

Patented Aug. 10, 1920..

UNITED STATES PATENT OFFICE.

FRANK YOKEL, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 PITTSBURGH LAMP, BRASS 8c GLASlS COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

LIGHTING-FIXTUEE Specification of Letters Patent. Patgfltgd A1103 10, 1920 Application filed November 26, 1917. Serial No. 203,891.

To all whom it may concern:

Be it known that I, FRANK YOKEL, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Lighting-Fixtures, of which the following is a specification.

My invention relates to lighting fixtures, and more particularly to semi-indirect electric light fixtures employing a bowl for the reception of the lamp and a reflector or shade above the bowl.

The class of lighting fixtures to which my invention relates are especially adapted for lighting large rooms, halls, stores, hospitals, etc, and among the objects of the present invention are to so shape and position the bowl and reflector as to provide a greater diffusion of the light rays than has heretofore been possible in fixtures of this character; to provide new and improved bowl and reflector supporting means, and an in1- proved construction and combination of parts, all as fully hereinafter described and claimed.

In the accompanying drawings, which illustrate an application of my invention, figure 1 is a vertical sectional view of my invention;

Figs. 2 and 8 are perspective views of the bowl reflector supporting means employed; and

Fig. l is a side elevational view showing the supporting means assembled with portions of rods projected therefrom.

Referring to the drawings, 2 designates an electric lemp disposed within an open-top bowl 3. The lamp socket 4 is secured to a threaded plug 5 having a ring 6, the latter being connected with a chain 7 by means of which the lighting fixture is suspended.

The bowl 3 together with a reflector or shade 8 is supported by common supporting means including, as illustrated and as preferred, two telescoping members 9 and 10. The top portion 11 of member 9 is formed with an opening 12 through which the plug 5 is passed to engage the upper end of the socket. D particularly shown by Fig. 2, and as illustrated, includes a series of outwardly projecting pins 14; and a spring arm locking member 15, the latter having a pin 16.

The second member entering into the com- The construction of member 9 is mon supporting means is provided with a series of bayonet slots 17 and a series of I member and adapted as shown by Fig. 1, to

support the reflector 8. The annular flange 19 is formed with openings 20 through which.

a series of supporting rods 21 are entered, said supporting rods at their upper ends be ing bent as shown at 22.

The lower ends of the supporting rods 21 are secured to the bowl by means of an adjustable screw device 23. The inner end of the screw device has an eye 24 adapted to engage the lower end of the supporting rod and the outer shank portion thereof is provided with a knob 26 designates a washer interposed between the interior face of the bowl and the eye of the screw 23.

In assembling the supporting means, member 9 is inserted within member 10 with the pins 1 1 entered in the bayonet slots '17. After the pins are entered in said slots 17, the member 9 is turned sufliciently to permit the pin 16 of the locking member 15 to enter a vertically extending slot 18, thereby locking the two members against relative rotational movement while assembled.

It will be understood that by the employment of the locking means in connection with the pins and bayonet slots, as described, a construction is provided that will prevent the said members 9 and 10 from being accidentally separated while the lighting fixture is suspended.

Attention is called to the concave-convex configuration of the glass reflector 8 and its disposition at a conside able distance above the upper end of the open-top bowl. The shape of this reflector and its position relative to the upper end of the bowl provides for a greater diffusion of light rays in fixtures of this character than has heretofore been possible. The concave reflecting sur face A of the light diffusing reflector preferably projects beyond the periphery of the upper end of the bowl.

hat I claim is 1. In a lighting fixture, the combination with an open-top bowl, a glass reflector spaced from the top of the bowl and having a central opening and a concavo-convex re fleeting portion extending from the opening with its concave side nearest to and projecting beyond the periphery of the upper end of the bowl, and common supporting means for the bowl and reflector including telescopingmembers provided with cooperating pins and slots, the outerof said members having an annular flange, the wall of the reflector opening mounted on the flange, and means connecting the flange and bowl.

2; In a lighting fixture, the combination with an open-top bowl, a glass reflector spaced from the top of the bowl and having a central opening and a concavo-convex reflectingiportion: extending from the opening with its concaveside nearest toand projecting beyond the periphery of the upper end of the bowl, and common supporting means for the bowl and reflector including,

FRANK YoKEL.

itnesses J. M. GEOGHEGAN, LoIs WINEMAN'. 

